store vs stash

store and stash both are nouns.

Word	Noun	Adjective	Verb	Adverb
store	Yes	No	Yes	No
stash	Yes	No	Yes	No

As nouns, stash is a hyponym of store; that is, stash is a word with a more specific, narrower meaning than store:

store (noun)	stash (noun)
a mercantile establishment for the retail sale of goods or services	a secret store of valuables or money
a depository for goods
an electronic memory device
a supply of something available for future use

store (verb)	stash (verb)
keep or lay aside for future use	save up as for future use
find a place for and put away for storage